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Oberdorfer Bronze Self Priming Pump 20 GPM 1/2 HP # 300B-J19

Item#: OBE-PMP-300B J19-K
Product Available Availability:Usually ships the next business day
Oberdorfer Bronze Self Priming Pump 20 GPM 1/2 HP # 300B-J19 (CC)
Sale: $1,730.00

Oberdorfer Bronze Self Priming Pump 20 GPM 1/2 HP # 300B-1-J26 with stainless shaft. Single phase, close-coupled, all bronze, centrifugal marine salt water pump. Designed for use as raw water recirculation pumps on marine air conditioners. They are used by major manufacturers of marine A/C units.


Applications: Marine air conditioner coolant pumps, bilge pumps, recirculation, live bait wells, marine fresh water systems, general liquid transfer. Construction: Casing, semi-open impeller and bracket are bronze. Monel sleeved motor shaft. Single mechanical seal with carbon faces, Buna elastomers and 304 stainless steel metal parts. Mounting: Below or above water line Connections: 1" X 1" female NPT suction and discharge Suction lift: Up to 20 feet Motor: Baldor 1/2 HP, 3450 RPM, Open drip proof, single phase, 115/230 volts, 60 Hz, with ball bearings front and back and built-in overload protection. Clockwise rotation, when facing back of motor. Maximum working temperature: 180 degrees Fahrenheit Carton dimension: 14" high, 12" wide, 18" long. Weight: 32 lbs

Pump Capacity Table
Model HP Total Dynamic Head (TDH)
5 10 15 20 25 30 Shut-off
Gallons Per Minute (GPM)
300B-J19 1/2 20 17 14 12 8 4 35

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Questions & Answers

A 1/2" pipe plug on the casing top is for initial filling of priming chamber and inlet line-- pump priming is automatic thereafter. I has a suction lift of 15 feet without a foot or check valve (25 foot suction lift using a foot or check valve and a filled inlet line).
These pump models are widely used for the pumping of Perchloroethylene.
No, they must be operated in the horizontal position.
Based upon the total BTU output of the A/C unit. Most manufacturers select pump size (capacity) based upon the following: 4 GPM (or 240 GPH) for each 12,000 BTU ( 1 Ton A/C)
One centrifugal pump will often serve as the coolant pump for two, three or even four condenser units on the same boat. Restrictor valves may be used on centrifugal pumps to reduce flow to desired amount - without damage to the pump unit.
If pump is to be mounted below the water line and with a flooded suction port, a centrifugal pump is generally preferred. Centrifugal pumps are quiet running, require less amperage, and are less easily damaged by running dry than are rubber impeller type pumps. However, most centrifugal pumps do not have suction lift capability (must have flooded suction to function).
If pump is to be mounted above the water line, a self priming unit is essential, such as the 300B-1-F26 Centrifugal above, or Rubber impeller type pumps

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